BACKGROUND: Selective metabotropic glutamate receptor 5 (mGluR5) antagonists inhibit transient lower oesophageal sphincter relaxations (TLESRs) in animals and acid reflux in humans. AIM: To assess the effect of single doses of the mGluR5 antagonist AZD2066 on TLESRs and reflux in humans. METHODS:Healthy male volunteers received AZD2066 13 mg and placebo (part A), or AZD2066 2 mg and AZD2066 6 mg and placebo (part B), in a randomised crossover study. Postprandial manometry/pH-impedance measurements were taken after each dose. RESULTS: A total of 13 individuals completed part A of the study and 19 individuals completed part B. There was a significant reduction in the geometric mean number of TLESRs (27%; P = 0.02) and the geometric mean number of reflux episodes (51%; P = 0.01) in subjects receiving AZD2066 13 mg compared with placebo. Adverse events in participants receiving AZD2066 13 mg were mostly related to the nervous system [dizziness (3/13); disturbance in attention (3/13)]. Adverse events were reversible and of mild intensity. There were no serious adverse events. The effects of AZD2066 appeared dose-dependent, with smaller reductions in TLESRs and reflux episodes (relative to placebo) and fewer adverse events observed for AZD2066 2 mg and AZD2066 6 mg compared with AZD2066 13 mg. CONCLUSION: The mGluR5-mediated inhibition of TLESRs may be a useful approach for inhibiting gastro-oesophageal reflux.
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BACKGROUND: Selective metabotropic glutamate receptor 5 (mGluR5) antagonists inhibit transient lower oesophageal sphincter relaxations (TLESRs) in animals and acid reflux in humans. AIM: To assess the effect of single doses of the mGluR5 antagonist AZD2066 on TLESRs and reflux in humans. METHODS: Healthy male volunteers received AZD2066 13 mg and placebo (part A), or AZD2066 2 mg and AZD2066 6 mg and placebo (part B), in a randomised crossover study. Postprandial manometry/pH-impedance measurements were taken after each dose. RESULTS: A total of 13 individuals completed part A of the study and 19 individuals completed part B. There was a significant reduction in the geometric mean number of TLESRs (27%; P = 0.02) and the geometric mean number of reflux episodes (51%; P = 0.01) in subjects receiving AZD2066 13 mg compared with placebo. Adverse events in participants receiving AZD2066 13 mg were mostly related to the nervous system [dizziness (3/13); disturbance in attention (3/13)]. Adverse events were reversible and of mild intensity. There were no serious adverse events. The effects of AZD2066 appeared dose-dependent, with smaller reductions in TLESRs and reflux episodes (relative to placebo) and fewer adverse events observed for AZD2066 2 mg and AZD2066 6 mg compared with AZD2066 13 mg. CONCLUSION: The mGluR5-mediated inhibition of TLESRs may be a useful approach for inhibiting gastro-oesophageal reflux.
Authors: Angela Arsova; Thor C Møller; Line Vedel; Jakob Lerche Hansen; Simon R Foster; Karen J Gregory; Hans Bräuner-Osborne Journal: Mol Pharmacol Date: 2020-05-01 Impact factor: 4.436
Authors: J Halicka; P Banovcin; M Halickova; M Demeter; R Hyrdel; M Tatar; M Kollarik Journal: Neurogastroenterol Motil Date: 2014-08-22 Impact factor: 3.598
Authors: Andrew S Felts; Alice L Rodriguez; Ryan D Morrison; Daryl F Venable; Jason T Manka; Brittney S Bates; Anna L Blobaum; Frank W Byers; J Scott Daniels; Colleen M Niswender; Carrie K Jones; P Jeffrey Conn; Craig W Lindsley; Kyle A Emmitte Journal: Bioorg Med Chem Lett Date: 2013-09-10 Impact factor: 2.823
Authors: Brittney S Bates; Alice L Rodriguez; Andrew S Felts; Ryan D Morrison; Daryl F Venable; Anna L Blobaum; Frank W Byers; Kera P Lawson; J Scott Daniels; Colleen M Niswender; Carrie K Jones; P Jeffrey Conn; Craig W Lindsley; Kyle A Emmitte Journal: Bioorg Med Chem Lett Date: 2014-06-11 Impact factor: 2.823